Liquid-fuel burner.



No. 760,396. PATENTED MAY 17, 1904.

A. E. JOHNSTONE.

LIQUID FUEL BURNER.

APPLICATION FILED APR. 14, 1903.

N0 MODEL.

UNiTnn STAT S Patented May 1'7, 1904.

ARTHUR ELLIOTT JOHNSTONE, OF .lLFORD, ENG-LAND.

LIQUID-FUEL BURNER.

SPECIFICATION forming part of Letters Patent No. 760,396, dated May 1'7,1904.

Application filed. April 1'1, 1903.

of Essex, England, have invented certain new and useful Improvements inand Relating to Liquid-Fuel Burners, of which the following is aspecification.

Thisinvention relates to liquid-fuel burners for use in furnaces andother situations where liquid fuel is employed.

According to the invention oil is caused to drip into avaporizing-chamber where the vaporization is effected by steam which isconducted through the chamber by means of a coil-piping, the steamsubsequently passing through to the nozzle, where it issues outwardly,inducing also the vaporized oil from the vaporizing-chamber.

The invention comprises the constructional features which arehereinafter described.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a sectional elevation of a liquidfuel burner providedaccording to the invention, and Fig. 2 is aside elevation correspondingthereto.

In carrying the invention into effect I employ a vaporizing-chamber a,at one end of which a cover plate or plug Z) is provided, which ispreferably screwed into the casing forming the vaporizing-chamber. Thiscover or plug 7) serves to carry a coil of piping 0, through which thesteam is caused to pass as a means for vaporizing the oil that isdripped into the vaporizing-chamber.

The cover or plug 7) aforesaid is provided with a passage of, throughwhich the steam is led through the piping c, and another passage 0 in adiametrically opposite position into which the steam subsequently passesafter traversing the piping c. The latter passage 0 communicates with anannular space f, provided in the cover or plug 1), from which the steammay pass inwardly through to the nozzle, as hereinafter described.

The cover or plug Z) carries a tubular valvespindle g, which passesaxially through the vaporizing-chamber a and through the coil ofsteam-piping c to the opposite end of the cha1n- Serial No. 152,529. (NoinocleL) her, where it is carried by means of a boss or hearing aprovided for the purpose. An operating Wheel or lever g is provided uponthe outwardlyprojecting extremity of the hollow valve-spindle gaforesaid, by means of which it may be rotated for adjustment. Withinthis hollow valve-spindle g a second valve-spindle 7/, coaxial therewithis carried, which valve-spindle 71/ is integrally provided at itsforward extremity with an outwardlyflaring part 71/, which is capable ofclosure against the pcripheraledge of the valvespindle aforesaid for theclosure or adjustment of the annular space between.

The central valve-spindle it is provided with screw-threads a at onepart to correspond with screw-threads provided at a part of the bore ofthe hollow valve-spindle g, by means of which the longitudinaladjustment of the central valve-spindle it may be effected on itsrotation by such means as a wheel or lever], mounted on theoutwardly-projecting extremity thereof.

A sleeve X: may be conveniently provided to surround the hollow spindleg at that part passing through the cover or plug 7) of thevaporizing-chamber, this sleeve 7: being provided with holes or slots71:, by means of which the steam may be led from the outer annular spacef in the cover of plug 7) through to the annularspace between thecentral valvespindle 7L and the outer valve-spindle g, slots or holesbeing also provided in the hollow valve-spindle for this purpose. Thehollow valve-spindle g and the central valve-spindle h are preferablyprovided toward their forward extremities with projections it on theircircumference or other means by which they may be held centrally toallow a uniform annular space, respectively, between the centralvalve-spindle lb andthe hollow. valvespindle g and between the hollowvalvespindle g and the boss or bearing a. thermore, toward the forwardextremity of the boss or bearing a aforesaid a continuous annularchamber Z is provided to surround the hollow valve-spindle aforesaid.

The extremity of thehollow valve-spindle 0 may be formed slightlyconical on the exterior to correspond with the formation of Furtheforward end of the boss or hearing a" aforesaid, the extremity thusforming a valve by means of which the supply of Vapor may be completelycut off or adjusted as required.

The respective valve-spindles h and g aforesaid may be provided withstuffing-glands for the purpose of insuring tightness.

In operation it will be understood that the oil drips into the vaporizeronto the coil of steam-piping, and the steam is led through the coil ofpiping by which the oil is completely vaporized in the chamber. Thesteam after passing through the coil of piping passes through to thenozzle, where it issues outwardly, inducing with it the oil which haspreviously been completely vaporized, as described.

It will be understood that by the means hereinbefore described the steamas well as the vapor is capable of being adjusted with the greatestnicety and precision.

In fitting the burner, for example, to a furnace-door, a hole is cut outof the door one and a half inches larger than the chamber aforesaid,which is placed in the opening leading into the furnace by three inchesto three and a half inches. An air-passage is formed all round thechamber, through which air to support combustion is drawn in by theaction of the burner.

In setting away the burner oil or liquid fuel is admitted into thevaporizing-chamber. When it is full, the steam is turned on. The steamis used after heating the liquid in spraying the oil until the liquid isperfectly evaporated. Then the steam is shut off.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a liquid-fuel burner, a vaporizingchamber, a plug closing saidvaporizing-chamber, an annular steam-chamber within said plug, a coil ofpiping within said vaporizingchamber and carried by said plug, an inletin said plug for steam, said inlet communicating with the coil and theopposite extremity of the coil communicating with the annularsteamchamber, means for'admitting oil to said vaporizing-chamber, anopening at the extremity of the vaporizing-chamber opposite to that inwhich the plug is carried, and avalve for con trolling the passage ofoil from the said vaporizing-chamber, and a valve controlling thepassage of steam therethrough, and means for conveying the steam to theoutlet from the vaporizing chamber substantially as described.

2. In a liquid-fuel burner, a vaporizingity is formed to close the saidopening from the vaporizing chamber, and holes transversely providedwithin said hollow spindle through which steam passes from the annularsteam-chamber aforesaid, a central valve-spindle arrangedwvithin thehollow spindle having its extremity formed as a valve to control thepassage of steam from the annular space between the centralvalve-spindle and the hollow spindle aforesaid, substantially asdescribed.

3. In a liquid-fuel burner, a vaporizingchamber, a plug closing saidvaporizing-chamber, an annular steam-chamber within said plug, a coil ofpiping within said vaporizingchamber and carried by said plug, an inletin said plug for steam, said inlet communicating with the coil and theopposite extremity of the coil communicating with the annularsteamchamber, means for admitting oil to said vaporizing-chamber, anopening at the extremity of the vaporizing-chamber opposite to that inwhich the plug is carried, a hollow spindle carried by said plug, whoseopposite extremity is formed to close the said opening from thevaporizingchamber, holes transversely provided within said hollowspindle through which steam passes from the annular steamchamberaforesaid, a central valve-spindle arranged within the hollow spindlehaving its extremity formed as a valve to control the passage of steamfrom theannular space between the central valve-spindle and the hollowspindle aforesaid, a sleeve surrounding the hollow spindle at a partadjacent to the annular steam-space aforesaid, said sleeve being screwedwithin the plug and carrying holes through which steam passes through tothe hollow spindle substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ARTHUR ELLIOTT JOHNSTONE.

Witnesses:

CHARLES ABBOTT, GEORGE RAY.

